Culminating Project Title
Date of Award
Culminating Project Type
Biological Sciences - Ecology and Natural Resources: M.S.
College of Science and Engineering
Alfred J. Hopwood
Ralph W. Gunderson
Chester W. Buckley
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This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Two different laboratory streams were.used to examine the life cycles of Hydropsyche bifida and H. morosa (Trichoptera:Hydropsychidae). Effectiveness of the artificial streams was determined. Hydropsyche bifida and H. morosa were shown to be useful bioassay organisms. Variations of the species-specific larval head patterns were drawn for both H. oifida and H. morosa.
Field studies were used to determine niche·separations for H. bifida and H. morosa in riffle areas of the Sauk River, St. Cloud, Minnesota. Physical-spatial factors such as retreat material, substrate preference, area of riffle and location on substrate were used to evaluate thi's separation. Eggs found in the river were indistin-· guishable from laboratory eggs obtained. The river eggs developed and photographs were made of the first instar, tentatively identified as Hydropsyche sp.
Voelz, Neal J., "Observations on the Life Cycles of Hydropsyche bifida Banks and Hydropsyche morosa Hagen (Trichoptera: Hydropsychidae)" (1983). Culminating Projects in Biology. 3.